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udev-rules: rewrite function to avoid clobbering arguments

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If the attribute wasn't found, the last filename looked at was returned in
the input/output argument. This just seems bad style.

The return value was ignored, so change function to return void.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-02-20 23:00:45 -05:00
parent 99f16bb8d9
commit f4850a1d95
1 changed files with 20 additions and 29 deletions
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49
src/udev/udev-rules.c
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@ -36,6 +36,7 @@
#include "glob-util.h"
#include "path-util.h"
#include "stat-util.h"
#include "stdio-util.h"
#include "strbuf.h"
#include "string-util.h"
#include "strv.h"
@ -686,41 +687,31 @@ static int import_parent_into_properties(struct udev_device *dev, const char *fi
return 0;
}
static int attr_subst_subdir(char *attr, size_t len) {
bool found = false;
if (strstr(attr, "/*/")) {
char *pos;
char dirname[UTIL_PATH_SIZE];
const char *tail;
DIR *dir;
strscpy(dirname, sizeof(dirname), attr);
pos = strstr(dirname, "/*/");
if (pos == NULL)
return -1;
pos[0] = '\0';
tail = &pos[2];
dir = opendir(dirname);
if (dir != NULL) {
static void attr_subst_subdir(char *attr, size_t len) {
const char *pos, *tail, *path;
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
struct stat stats;
pos = strstr(attr, "/*/");
if (!pos)
return;
if (dent->d_name[0] == '.')
continue;
strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
if (stat(attr, &stats) == 0) {
found = true;
tail = pos + 2;
path = strndupa(attr, pos - attr + 1); /* include slash at end */
dir = opendir(path);
if (dir == NULL)
return;
for (dent = readdir(dir); dent != NULL; dent = readdir(dir))
if (dent->d_name[0] != '.') {
char n[strlen(dent->d_name) + 1 + strlen(tail) + 1];
strscpyl(n, sizeof n, dent->d_name, "/", tail, NULL);
if (faccessat(dirfd(dir), n, F_OK, 0)) {
strscpyl(attr, len, path, n, NULL);
break;
}
}
closedir(dir);
}
}
return found;
}
static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) {